str1=' qwertyuiop'
str2= '1234567'
print(str1[0])
print('qwertyuiop'[2])

print(str1[:])
print(str1[:4])
print(str2[::2])

h = 'Hello'
w = 'world'
hw = h + w
print(hw)

list1 = [1,2,3,4,5,6,7,8,9]
list2 = [1,3,1,3,1,3]
print(list1[6])

for l in list1:
    print(l)

